feat: add USDT to sUSDS stablecoin e-mode (#535)

Co-authored-by: Harsh Pandey <[email protected]>
Co-authored-by: Lukas <[email protected]>
Co-authored-by: marczeller <[email protected]>

diffs/AaveV3Ethereum_EnableSUSDeUSDTLiquid_20241125_before_AaveV3Ethereum_EnableSUSDeUSDTLiquid_20241125_after.md

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+## Emodes changed
+
+### EMode: ETH correlated(id: 1)
+
+
+
+### EMode: sUSDe Stablecoins(id: 2)
+
+| description | value before | value after |
+| --- | --- | --- |
+| eMode.label (unchanged) | sUSDe Stablecoins | sUSDe Stablecoins |
+| eMode.ltv (unchanged) | 90 % | 90 % |
+| eMode.liquidationThreshold (unchanged) | 92 % | 92 % |
+| eMode.liquidationBonus (unchanged) | 3 % | 3 % |
+| eMode.borrowableBitmap | USDC, USDS | USDC, USDT, USDS |
+| eMode.collateralBitmap (unchanged) | sUSDe | sUSDe |
+
+
+### EMode: rsETH LST main(id: 3)
+
+
+
+## Raw diff
+
+```json
+{
+  "eModes": {
+    "2": {
+      "borrowableBitmap": {
+        "from": "34359738376",
+        "to": "34359738632"
+      }
+    }
+  }
+}
+```

src/20241125_AaveV3Ethereum_EnableSUSDeUSDTLiquid/AaveV3Ethereum_EnableSUSDeUSDTLiquid_20241125.sol

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+// SPDX-License-Identifier: MIT
+pragma solidity ^0.8.0;
+
+import {AaveV3EthereumAssets, AaveV3EthereumEModes} from 'aave-address-book/AaveV3Ethereum.sol';
+import {AaveV3PayloadEthereum} from 'aave-helpers/src/v3-config-engine/AaveV3PayloadEthereum.sol';
+import {EngineFlags} from 'aave-v3-origin/contracts/extensions/v3-config-engine/EngineFlags.sol';
+import {IAaveV3ConfigEngine} from 'aave-v3-origin/contracts/extensions/v3-config-engine/IAaveV3ConfigEngine.sol';
+/**
+ * @title Enable sUSDe/USDT Liquid
+ * @author Aave Chan Initiative
+ * - Snapshot: Direct-to-AIP
+ * - Discussion: https://governance.aave.com/t/arfc-enable-susde-usdt-liquid-e-mode-on-core-instance/19939
+ */
+contract AaveV3Ethereum_EnableSUSDeUSDTLiquid_20241125 is AaveV3PayloadEthereum {
+  function assetsEModeUpdates()
+    public
+    pure
+    override
+    returns (IAaveV3ConfigEngine.AssetEModeUpdate[] memory)
+  {
+    IAaveV3ConfigEngine.AssetEModeUpdate[]
+      memory assetEModeUpdates = new IAaveV3ConfigEngine.AssetEModeUpdate[](1);
+
+    assetEModeUpdates[0] = IAaveV3ConfigEngine.AssetEModeUpdate({
+      asset: AaveV3EthereumAssets.USDT_UNDERLYING,
+      eModeCategory: AaveV3EthereumEModes.SUSDE_STABLECOINS,
+      borrowable: EngineFlags.ENABLED,
+      collateral: EngineFlags.DISABLED
+    });
+
+    return assetEModeUpdates;
+  }
+}

src/20241125_AaveV3Ethereum_EnableSUSDeUSDTLiquid/AaveV3Ethereum_EnableSUSDeUSDTLiquid_20241125.t.sol

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+// SPDX-License-Identifier: MIT
+pragma solidity ^0.8.0;
+
+import {AaveV3Ethereum} from 'aave-address-book/AaveV3Ethereum.sol';
+
+import 'forge-std/Test.sol';
+import {ProtocolV3TestBase, ReserveConfig} from 'aave-helpers/src/ProtocolV3TestBase.sol';
+import {AaveV3Ethereum_EnableSUSDeUSDTLiquid_20241125} from './AaveV3Ethereum_EnableSUSDeUSDTLiquid_20241125.sol';
+
+/**
+ * @dev Test for AaveV3Ethereum_EnableSUSDeUSDTLiquid_20241125
+ * command: FOUNDRY_PROFILE=mainnet forge test --match-path=src/20241125_AaveV3Ethereum_EnableSUSDeUSDTLiquid/AaveV3Ethereum_EnableSUSDeUSDTLiquid_20241125.t.sol -vv
+ */
+contract AaveV3Ethereum_EnableSUSDeUSDTLiquid_20241125_Test is ProtocolV3TestBase {
+  AaveV3Ethereum_EnableSUSDeUSDTLiquid_20241125 internal proposal;
+
+  function setUp() public {
+    vm.createSelectFork(vm.rpcUrl('mainnet'), 21271611);
+    proposal = new AaveV3Ethereum_EnableSUSDeUSDTLiquid_20241125();
+  }
+
+  /**
+   * @dev executes the generic test suite including e2e and config snapshots
+   */
+  function test_defaultProposalExecution() public {
+    defaultTest(
+      'AaveV3Ethereum_EnableSUSDeUSDTLiquid_20241125',
+      AaveV3Ethereum.POOL,
+      address(proposal)
+    );
+  }
+}

src/20241125_AaveV3Ethereum_EnableSUSDeUSDTLiquid/EnableSUSDeUSDTLiquid.md

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+---
+title: "Enable sUSDe/USDT Liquid E-Mode on Core Instance"
+author: "Aave Chan Initiative"
+discussions: "https://governance.aave.com/t/arfc-enable-susde-usdt-liquid-e-mode-on-core-instance/19939"
+snapshot: "Direct-to-AIP"
+---
+
+## Simple Summary
+
+This proposal aims to enable sUSDe/USDT liquid E-Mode for the Core Instance. By implementing this change, we seek to enhance capital efficiency for borrowers using sUSDe as collateral, specifically for borrowing USDT. This is a Direct to AIP Proposal.
+
+## Motivation
+
+sUSDe has demonstrated significant usage as collateral for borrowing stablecoins and to increase borrowing options we now look to enable E-Mode for USDT borrows against sUSDe.
+
+By implementing this proposal, we aim to optimize the use of sUSDe within the Aave ecosystem, attracting more liquidity and providing more options for both borrowers and lenders.
+
+## Specification
+
+USDT on the Core instance will be added to the sUSDe stablecoin E-Mode
+
+## References
+
+- Implementation: [AaveV3Ethereum](https://github.com/bgd-labs/aave-proposals-v3/blob/main/src/20241125_AaveV3Ethereum_EnableSUSDeUSDTLiquid/AaveV3Ethereum_EnableSUSDeUSDTLiquid_20241125.sol)
+- Tests: [AaveV3Ethereum](https://github.com/bgd-labs/aave-proposals-v3/blob/main/src/20241125_AaveV3Ethereum_EnableSUSDeUSDTLiquid/AaveV3Ethereum_EnableSUSDeUSDTLiquid_20241125.t.sol)
+- Snapshot: Direct-to-AIP
+- [Discussion](https://governance.aave.com/t/arfc-enable-susde-usdt-liquid-e-mode-on-core-instance/19939)
+
+## Copyright
+
+Copyright and related rights waived via [CC0](https://creativecommons.org/publicdomain/zero/1.0/).

src/20241125_AaveV3Ethereum_EnableSUSDeUSDTLiquid/EnableSUSDeUSDTLiquid_20241125.s.sol

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+// SPDX-License-Identifier: MIT
+pragma solidity ^0.8.0;
+
+import {GovV3Helpers, IPayloadsControllerCore, PayloadsControllerUtils} from 'aave-helpers/src/GovV3Helpers.sol';
+import {GovernanceV3Ethereum} from 'aave-address-book/GovernanceV3Ethereum.sol';
+import {EthereumScript} from 'solidity-utils/contracts/utils/ScriptUtils.sol';
+import {AaveV3Ethereum_EnableSUSDeUSDTLiquid_20241125} from './AaveV3Ethereum_EnableSUSDeUSDTLiquid_20241125.sol';
+
+/**
+ * @dev Deploy Ethereum
+ * deploy-command: make deploy-ledger contract=src/20241125_AaveV3Ethereum_EnableSUSDeUSDTLiquid/EnableSUSDeUSDTLiquid_20241125.s.sol:DeployEthereum chain=mainnet
+ * verify-command: FOUNDRY_PROFILE=mainnet npx catapulta-verify -b broadcast/EnableSUSDeUSDTLiquid_20241125.s.sol/1/run-latest.json
+ */
+contract DeployEthereum is EthereumScript {
+  function run() external broadcast {
+    // deploy payloads
+    address payload0 = GovV3Helpers.deployDeterministic(
+      type(AaveV3Ethereum_EnableSUSDeUSDTLiquid_20241125).creationCode
+    );
+
+    // compose action
+    IPayloadsControllerCore.ExecutionAction[]
+      memory actions = new IPayloadsControllerCore.ExecutionAction[](1);
+    actions[0] = GovV3Helpers.buildAction(payload0);
+
+    // register action at payloadsController
+    GovV3Helpers.createPayload(actions);
+  }
+}
+
+/**
+ * @dev Create Proposal
+ * command: make deploy-ledger contract=src/20241125_AaveV3Ethereum_EnableSUSDeUSDTLiquid/EnableSUSDeUSDTLiquid_20241125.s.sol:CreateProposal chain=mainnet
+ */
+contract CreateProposal is EthereumScript {
+  function run() external {
+    // create payloads
+    PayloadsControllerUtils.Payload[] memory payloads = new PayloadsControllerUtils.Payload[](1);
+
+    // compose actions for validation
+    IPayloadsControllerCore.ExecutionAction[]
+      memory actionsEthereum = new IPayloadsControllerCore.ExecutionAction[](1);
+    actionsEthereum[0] = GovV3Helpers.buildAction(
+      type(AaveV3Ethereum_EnableSUSDeUSDTLiquid_20241125).creationCode
+    );
+    payloads[0] = GovV3Helpers.buildMainnetPayload(vm, actionsEthereum);
+
+    // create proposal
+    vm.startBroadcast();
+    GovV3Helpers.createProposal(
+      vm,
+      payloads,
+      GovernanceV3Ethereum.VOTING_PORTAL_ETH_POL,
+      GovV3Helpers.ipfsHashFile(
+        vm,
+        'src/20241125_AaveV3Ethereum_EnableSUSDeUSDTLiquid/EnableSUSDeUSDTLiquid.md'
+      )
+    );
+  }
+}

src/20241125_AaveV3Ethereum_EnableSUSDeUSDTLiquid/config.ts

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+import {ConfigFile} from '../../generator/types';
+export const config: ConfigFile = {
+  rootOptions: {
+    author: 'Aave Chan Initiative',
+    pools: ['AaveV3Ethereum'],
+    title: 'Enable sUSDe/USDT Liquid',
+    shortName: 'EnableSUSDeUSDTLiquid',
+    date: '20241125',
+    discussion:
+      'https://governance.aave.com/t/arfc-enable-susde-usdt-liquid-e-mode-on-core-instance/19939',
+    snapshot: 'Direct-to-AIP',
+    votingNetwork: 'POLYGON',
+  },
+  poolOptions: {
+    AaveV3Ethereum: {
+      configs: {
+        EMODES_ASSETS: [
+          {
+            asset: 'USDT',
+            eModeCategory: 'AaveV3EthereumEModes.SUSDE_STABLECOINS',
+            collateral: 'DISABLED',
+            borrowable: 'ENABLED',
+          },
+        ],
+      },
+      cache: {blockNumber: 21266484},
+    },
+  },
+};